6 resultados para Friedman, Benny

em Chinese Academy of Sciences Institutional Repositories Grid Portal


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分别应用管式炉反应器和热重分析手段对印刷线路板废弃物的热解行为和热解动力学进行了实验研究。在管式炉中,研究不同的热解温度:700~950℃,对产物分布和气体成分分布的影响。实验结果表明:PCB热解气体的主要成分是H2和CO2,气体的热值较低,仅为2.09~5.41MJ/m^3,PCB不适合以气体产物为目标的能源利用方式。应用Friedman方法对PCB的热解动力学进行了研究,求得PCB的热解动力学参数分别是:表观活化能190.92kJ/mol,反应级数5.97,指前因子lnA47.14min^-1。


A tubular furnace and thermogravimetry analysis (TGA) was used to investigate the characteristics of printed circuit'boards (PCB) pyrolysis and its kinetics,respectively. The effect of different temperatures: 700 ~950℃ on the products distribution and gas composition of PCB pyrolysis was explored. The results indicate that the main components of the gas derived from PCB are H2 and CO2 and the gas has a lower heating value (LHV) : 2.09~5.41 MJ/m^3. It can be concluded that PCB is not favorable for energy application directed at gas production. Friedman method was utilized to analyze the pyrolysis kinetics of PCB. The kinetic parameters obtained were: apparent activation energy 190.92 kJ/mol, reaction order 5.97 ,pre-exponential factor lnA 47.14 min^-1.

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本论文通过在兰州放射性束流线(RIBLL)上进行的6He同Si靶和Pb靶反应实验测量得到了6He与Si靶、Pb靶反应总截面和去除双中子截面以及6He与Si靶、Pb靶反应弹核碎裂产生4He碎片的纵向动量分布。采用能够很好描述正常核反应总截面的半经验的Shen公式计算了4,6 He同Be,C,Al,Si靶的反应总截面。对于4He,从低能到高能理论计算和实验数据符合很好。但是对于6He,理论计算和实验数据符合不好。通过SHF理论、RMF理论、RDDH理论、各种核子密度分布形式(2PHO-tyPe,HO-tyPe,2PFM-tyPe及新提出的修正的费米密度分布MFM-type)计算出6He的各种密度分布(包括晕核密度、皮核密度及正常核密度),带入Glotlber模型计算了6He同Be,C,Al,Si靶的反应总截面以及双中子去除截面,只有使用晕核密度理论计算才能够很好地符合实验数据,进一步证实6He具有双中子晕核结构,确定其基本构型。比较了轻靶(Si革巴)和重靶(Pb靶)电磁离解效应刘一反应总截面和去除双中子截面的影响,重靶电磁离解效应明显。采用能够很好描述稳定核的动量分布宽度的Goldllaber理论、Morrissey经验公式、W.A.Friedman的重离子弹核碎裂模型,以及Lise小组发展的Lise程序,计算了6He与Si靶和Pb靶反应弹核碎裂产生的4He碎片的纵向动量分布,也同样证实了6He具有双中子晕核结构。论文最后,利用同位旋相关的Boltzmann-Langevin方程(IBLE)计算稳定核4He和奇异核6He同c靶的反应系统来研究6He反应动力学特性,研究反应产生的核素产生截面,以及4,5 He产生截面随碰撞参数的变化。

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The need for building human and institutional capacity has been identified in Agenda 21 of the UNCED conference as well as by a number of international environmental institutions as essential for integrated coastal management (ICM) and sustainable development in developing coastal states. There is a growing need for coastal management practitioners and organizations with expertise in planning and implementation for ICM. The application of strategies for institutional development and building human capacity in coastal management and other fields shows that short-term intensive training efforts and long-term institutional strengthening programs are appropriate to address the issues and needs of ICM. An overview of the experience of the URI/USAID International Coastal Resources Management Program in Sri Lanka, Thailand and Ecuador presents lessons learned for strengthening ICM efforts in developing countries.

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C_(60)及其相关衍生物的生物活性研究具有重要意义.由于C_(60)分子本身是非极性的,难溶于常见的极性溶剂,使得它在生物化学领域的研究和应用受到很大的限制.合成出水溶性的C_(60)衍生物将很好地解决这一问题.1993年Friedman等人发现水溶性C_(60)衍生物[HOCO(CH_2)_2CONH(CH_2)_2-C_6H_4]_2C_(61)具有抗HIVP的作用.黄文栋等人报道了水溶性C_(60)-脂质体对人子宫颈癌细胞具有很强的杀伤效应.最近,Chiang等人采用化学发光的方法研究了多羟基C_(60)衍生物——富勒醇吞噬超氧阴离子自由基的功效,结果表明富勒醇对黄嘌呤/黄嘌呤氧化酶产生的超氧阴离子自由基具有良好的清除作用,有关富勒醇对羟基自由基的清除作用研究未见报道.